CVE-2024-46845 tracing/timerlat: Only clear timer if a kthread exists

In the Linux kernel, the following vulnerability has been resolved: tracing/timerlat: Only clear timer if a kthread exists The timerlat tracer can use user space threads to check for osnoise and timer latency. If the program using this is killed via a SIGTERM, the threads are shutdown one at a ti...

CVE-2024-46845

CVE-2024-46845 (Linux kernel): The timerlat use-after-free occurs when a SIGTERM kills user-space tracing threads, causing an hrtimer to be freed twice during thread shutdown. The documented fix cancels the hrtimer only if the associated thread still exists and adds an interface_lock around tlat_...